// 闭包
function foo() {
    var myName = '乐乐'
    let test1 = 1
    let test2 = 2
    var innerBar = {
      setName: function(newName) {
        myName = newName
      },
      getName: function() {
        console.log(test1);
        return myName
      }
    }
    return innerBar
  }
  var bar = foo()
  bar.setName('老汪')
  
  console.log(bar.getName());